Prince Hussain Aga Khan, second son of His Highness the Aga Khan and Princess Salimah Aga Khan, married Miss Kristin White, who adopted the name Khaliya upon
embracing Islam, on Saturday 16th September

i think despite of the very big hat her suit is very beatiful and looking very elegant, when it comes to wedding i dont know very well about sari but her sari looks very nice maybe because of she is so beatiful and her hair style, i just love it especially hairgrip looks very different.

I searched Wikipedia and found that the Ismaili muslims consider the present Aga Khan, HSH Prince Karim, a direct descendant of the prophet mohammed through the prophet's daughter Fatima and her husband Ali ibn Abi Talib who was the first Shi'a Imam (or Shi'a) leader. This of course is controversial with other muslims. anyways, hope this is helpful. and if you need more info, just search wikipedia (type in Aga Khan IV).

Perfect response Little_star.
A slight off-topic diversion from the wedding, but...
On a Forum with extensive coverage of Muslim royals from Morocco to Jordan to Dubai to Brunei, and places in between, it is disappointing to see such stereotyping.

The bride is American.
The Aga Khan IV is the son of Prince Aly Khan and Princess Tajuddawlah Aly Khan, née the Hon. Joan Barbara Yarde-Buller, daughter of the 3rd Baron Churston.
The bride's mother is the Begum Salimah Aga Khan, née Sarah ("Sally") Frances Croker-Poole, a leading British model of her day.

The Aga Khan I and Aga Khan II were born in Iran, members of the Qajar dynasty; the Aga Khan III in Karachi (his mother was also a Qajar); Prince Aly Khan in Turin (his mother was Italian) and the Aga Khan IV in Geneva. Thus the Aga Khan IV and his eldest children are of Iranian-Italian-English descent.

Actually, the way they're dressed has to do with their historical ties with Pakistan. As mentioned above, Aga Khan III was born in Karachi, then part of British India but now the largest city in present-day Pakistan.
The current Aga Khan's father Prince Aly Khan also served as Pakistan's representative to the United Nations.
Karachi today is home to the prestigious Aga Khan University and Hospital, not to mention the many schools in his name. He's a frequent visitor to the country as well.
The bride appears to be wearing a sari, worn all over the Indian subcontinent while the groom's outfit is more typical of what Muslim men wear in the region.